Back to EveryPatent.com
United States Patent |
5,782,455
|
Burnworth
|
July 21, 1998
|
Valve
Abstract
A valve has an elongated body open-ended, with a bore with a center line
extending from one end of the body to the other. The bore is interrupted
by a fluid tight partition, on both sides of which, ports extend through
the wall of the body. An elliptical seat is formed on the outer surface of
the body between the ports, the seat or channel being diagonal as viewed
in side elevation with respect to the bore center line. A sleeve is
rotatably mounted on the body. The sleeve has a smoothly cylindrical bore
extending from an inlet end to a diagonal, radially outwardly extending
annular shelf, between the first cylindrical bore and a second bore that
is radially larger than the first bore. Channel-defining ribs extend
parallel to the center line, from the shelf to a point short of the outlet
end of the sleeve. The ribs have a radially inner face formed on the same
radius as or slightly larger radius than the first bore. A seal in the
elliptical seat in the closed position of the valve is in uniform
engagement with the smooth cylindrical first bore throughout its
perimeter, and in its open position is at least in part in engagement with
the radially inner surfaces of the ribs, whereby in the open position,
liquid flowing through the ports on one side of the body partition can
flow in the channels defined by the ribs to the outlet ports, hence
through the valve, but in the closed position, the engagement of the seal
with the uniformly smooth, uninterrupted first bore prevents liquid from
flowing past the seal.
Inventors:
|
Burnworth; Douglas J. (Confluence, PA)
|
Assignee:
|
Gilmour, Inc. (Newark, DE)
|
Appl. No.:
|
695343 |
Filed:
|
August 9, 1996 |
Current U.S. Class: |
251/345; 251/343; 251/344 |
Intern'l Class: |
F16K 031/00 |
Field of Search: |
251/343,344,345
|
References Cited
U.S. Patent Documents
3425664 | Feb., 1969 | Niskin | 251/344.
|
3788603 | Jan., 1974 | Snider | 251/345.
|
5332194 | Jul., 1994 | Austin, Jr. et al. | 251/345.
|
Foreign Patent Documents |
1223830 | Mar., 1971 | GB | 251/345.
|
Primary Examiner: Ferensic; Denise L.
Assistant Examiner: Ball; John
Attorney, Agent or Firm: Polster, Lieder, Woodruff & Lucchesi, LC
Claims
I claim:
1. A valve having an elongated body, said body having an inlet end adapted
to be connected to a supply of liquid under pressure and an outlet end
through which liquid flows when said valve is open, said body having a
cylindrical section through a mid portion of its longitudinal extent,
first means for sealing an inlet end of said mid-portion, and second seal
means, spaced lengthwise of said body from said first sealing means, for
sealing an outlet end of said mid portion, and an elliptical seal seat on
an exterior surface of said cylindrical section between said first and
second sealing means, said elliptical seal seat being circular as viewed
in plan and diagonal as viewed in side elevation, said body having an
interior fluid-tight partition between the first and second sealing means,
and ports through said side wall on longitudinally opposite sides of said
partition; and a sleeve, mounted on said body for rotation with respect
thereto, said sleeve having a hollow, open ended cylindrical wall,
circular in transverse cross-section, said wall having a first,
uninterruptedly smooth interior wall surface section through a portion of
an inlet end of its length, a second, radially outwardly offset portion of
said inner wall surface defining with said first section a ledge extending
diagonally in side elevation, a plurality of channel-defining ribs in said
offset portion extending longitudinally from said ledge toward an open
outlet end of said sleeve but short thereof, and a third, uninterrupted
inner wall surface section between an outer end of said ribs and an open
outlet end of said sleeve, a radially inner face of each rib lying on
substantially the same radius as the first wall surface section, said
first surface section being in continuous engagement with a seal mounted
in the elliptical seat in one, closed, position of said sleeve with
respect to said body, and said faces of said ribs being in engagement with
at least a portion of a said seal in a rotated, open position of said
sleeve.
2. A valve having an elongated body with a longitudinal center line and a
side wall, circular in plan with respect to said longitudinal center line,
said body having an inlet end adapted to be connected to a supply of
liquid under pressure, said body side wall having a cylindrical section
through a mid portion of its longitudinal extent, a first circular seal
seat on an exterior surface of said cylindrical section at an end of said
cylindrical section nearest said inlet end of said body, and a second
circular seal seat on an exterior surface of said cylindrical section at
an outlet end of said cylindrical section remote from said first seal
seat, and an elliptical seal seat on said exterior surface of said
cylindrical section between said first and second seal seats, said
elliptical seal seat being circular as viewed down said longitudinal
center line and diagonal as viewed perpendicularly to said longitudinal
center line, and seal means in each of said seal seats, said body having
an interior fluid-tight partition between the second seal seat and the
elliptical seal seat, and ports through said side wall on opposite sides
of said partition; and a sleeve with a longitudinal center line, mounted
on said body for rotation with respect thereto, said sleeve having a
hollow, open ended cylindrical wall, circular in transverse cross-section,
said wall having a first, uninterruptedly smooth interior wall surface
section through a portion of an inlet end of its length, a second,
radially outwardly offset portion of said inner wall surface defining with
said first section a ledge extending diagonally with respect to the
longitudinal center line of said sleeve, a plurality of channel-defining
ribs in said offset portion extending third, uninterrupted inner wall
surface section between an outer end of said ribs and an open outlet end
of said sleeve, a radially inner face of each rib lying on substantially
the same radius as the first wall surface section, said first surface
section being in continuous engagement with a seal in the elliptical seat
in one, closed, position of said sleeve with respect to said body, and
said faces of said ribs being in engagement with at least a portion of a
said seal in a rotated, open position of said sleeve.
3. The valve of claim 2 wherein the seals are O-rings.
4. The valve of claim 2 in which an annular channel is provided in the
exterior surface of the body wall at said first end of the cylindrical
section of the body, and said sleeve has a radially inwardly extending lip
at one end, extending into said channel.
5. The valve of claim 1 wherein the body has a stop formed in an exterior
surface and the sleeve has tabs engaging said stop when the sleeve is in
fully closed position and fully open position.
Description
BACKGROUND OF THE INVENTION
In many applications, such as lawn sprinklers, garden hoses and the like,
it is desirable to have near the outlet a valve by which the flow of water
can be controlled. With conventional garden hose nozzles, the flow can be
shut off, but the spray pattern changes from coarse to very fine in the
process.
One of the objects of this invention is to provide a streamlined valve that
is readily installed immediately adjacent a nozzle or lawn sprinkler or
the like, by which the flow of water can be regulated or turned off
completely.
Other objects will become apparent to those skilled in the art in the light
of the following description and accompanying drawing.
SUMMARY OF THE INVENTION
In accordance with this invention, generally stated, a valve has an
elongated tubular open-ended body with a longitudinal center line and a
side wall, circular in plan with respect to the longitudinal center line,
and a sleeve rotatably mounted on the body. The body is adapted to be
connected at a first, inlet, end to a supply of liquid under pressure, and
at a second, outlet end, to an outlet. Seals are provided at outlet and
inlet ends of a mid section of the body, and between them, an elliptical
seal, circular in plan view, and diagonal in side elevation with respect
to the longitudinal center line. In the preferred embodiment, the body
side wall has a first circular seal seat channel on an exterior surface of
the mid section of the body at the outlet end of the mid-section, and a
second circular seal seat channel at the inlet end of the mid-section
remote from the first seal seat, and an elliptical seal seat channel on
the exterior surface of the mid-section between the first and second seal
seats. In the preferred embodiment, O-rings are seated in each of the seal
seat channels. The body has an interior fluid-tight partition between the
second seal seat and the elliptical seal seat, and ports through the body
side wall on opposite sides of the partition lengthwise of the body.
The sleeve has a longitudinal center line. The sleeve has a hollow, open
ended cylindrical wall, circular in transverse cross section. The wall has
a first, uninterruptedly smooth interior wall section through a portion of
its length, a second radially outwardly offset portion defining with the
first section a ledge extending diagonally with respect to the
longitudinal center line of the sleeve, and channel defining ribs in the
off set portion extending longitudinally from the ledge toward an open
outlet end of the sleeve but short thereof. A third uninterrupted section
lies between the outer end of the ribs and the open outlet end of the
sleeve. A radially inner face of each rib is smooth and lies on
substantially the same radius as the first wall section. The first wall
section is in continuous engagement with the seal in the elliptical seat
in one, closed, position of the sleeve with respect to the body and the
ribs are in engagement with at least a portion of the seal in a rotated,
open position of the sleeve. In the closed position, water going through
the ports on the inlet or pressure side of the valve is prevented from
flowing through the valve by the engagement of the seal in the elliptical
seal seat with the smooth uninterrupted surface of the sleeve wall. In the
open position, water passing through the ports on the inlet side can flow
through the channels defined by the longitudinally extending spaced ribs,
through the ports on the outlet side of the partition, hence out the
outlet end of the valve body. In the preferred embodiment, a race channel
is provided at the inlet end of the cylindrical section of the body, an
outboard race-defining wall being chamfered to slope radially inwardly
toward the inlet end, and an annular, radially inwardly extending lip is
provided around the inlet end of the sleeve, an inboard edge of which lip
is chamfered, so that when the sleeve is assembled to the body, the lip
can be cammed outwardly along the chamfered surfaces until the lip clears
the inlet wall and snaps into the channel that forms the race in which the
lip is then seated for rotation. The valve body has molded into it a stop
against which tabs molded on diametrically opposite sides of the outlet
edge of the sleeve abut in the fully open and the fully closed position of
the sleeve. In the illustrative embodiment shown, the inlet end of the
valve body is provided with an externally serrated or corrugated section
or barb, adapted to be forced into a hose to mount the valve on the hose,
and the outlet end of the valve body is provided with a screw threaded
section to receive an internally threaded female fitting of a nozzle or
lawn sprinkler or the like.
IN THE DRAWINGS
In the drawing, FIG. 1 is a view in side elevation of one embodiment of
valve of this invention;
FIG. 2 is a longitudinal sectional view of the valve shown in FIG. 1,
showing the valve in closed position;
FIG. 3 is a longitudinal sectional view of the valve shown in FIGS. 1 and 2
with the valve in open position;
FIG. 4 is a sectional view taken along the line 4--4 of FIG. 5;
FIG. 5 is a top plan view of a sleeve member of the valve;
FIG. 6 is a longitudinal sectional view in a direction opposite the views
shown in FIGS. 2 and 3, of the valve body alone; and
FIG. 7 is a fragmentary sectional view at right angles to the views shown
in FIGS. 2, 3 and 6 of the valve body alone.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawings for one illustrative embodiment of the valve
of this invention, reference numeral 1 indicates the valve which is made
up of two main elements, a body 2 and a sleeve 3. In the preferred
embodiment, both parts are molded of a plastic such as polypropylene.
The body 2 has a side wall 4, with an interior surface 5 and an exterior
surface 6. The body 2 is elongated and hollow, with a longitudinal center
line 7. In the illustrations, an outlet or discharge end 8 of the body is
shown at the top. The external surface 6 of the wall 4 has threads 9 at
the outlet end, and fins 10 extending radially outwardly between the
outlet end and a mid-section of the body. The terms "inboard" and
"outboard" are used to indicate a direction toward and away from the
mid-section of the body. The interior surface 5 describes a cylindrical
conduit section 11 from the outlet end 8 to a radially inwardly extending
annular ledge 12 defined by a radially inwardly stepped reduction in the
diameter of the side wall 4 as compared with the diameter through the
straight conduit section 11. There is a corresponding ledge 18 on the
external surface of the side wall 4, from which an inboard outlet seal
channel wall 16 extends radially outwardly to form a wall of an outlet end
seal channel 14, the outboard side of which is formed by an annular
outboard wall 15. An O-ring 17 is seated in the channel 14.
An inlet end 20 of the valve has on the exterior surface of the wall 4 a
barb section 21 on which a hose can be mounted. At the inboard end of the
barb section 21 an outboard radially outwardly extending wall 23, a
radially outside surface of which is chamfered to slope radially inwardly
toward the inlet end 20, constitutes one wall of a race 24, defined at its
inboard side by a race wall 25. The wall 25 serves as an outboard wall of
an inlet seal channel 26, defined on its inboard side by an inboard wall
seal channel wall 27. An O-ring 28 is seated in the inlet seal channel 26.
An elliptical seal channel 30 defined by walls 31 and 32, contains an
O-ring 33. The elliptical channel 30 is positioned between the inlet seal
channel 26 and the outlet seal channel 14, within the mid section of the
valve body. An O-ring 33 is seated in the elliptical channel. As can be
seen by reference to FIGS. 2, 3 and 6, the elliptical channel is diagonal
with respect to the center line 7 of the body. It will appear to be
circular in plan view.
A fluid tight partition 35 extends, in this embodiment, diagonally,
parallel to the inlet side wall 31 of the elliptical seat, although
functionally, the partition need not be parallel to the elliptical seat.
Inlet ports 37 extend through the wall 4 on the inlet side of the
partition 35. Outlet ports 39 extend through the wall 4 on the outlet side
of the partition 35, as shown in FIGS. 2, 3, 6 and 7.
Two stops 41 are molded into the exterior wall surface of the wall 49
immediately below the fins 10, for a purpose which will be explained
below.
The sleeve 3 has a sleeve wall 45 with an interior surface 46 and an
exterior surface 47. When the sleeve is mounted on the body, they have
coincident longitudinal center lines. Grip ribs 48 on the exterior surface
47 facilitate turning of the sleeve on the body. A tab 49 at an outlet end
50 of the sleeve wall cooperates with the stops 41 on the body to define
the fully open and fully closed positions of the sleeve with respect to
the body. The tab 49 and stops 41 limit the rotation of the sleeve to one
hundred eighty degrees, from fully closed to fully open position, and vice
versa.
The sleeve has an inlet end 55. The interior surface 46 of the sleeve is
divided into three zones: an inlet section bore with a smooth,
uninterrupted interior surface 56, extending from inboard of a lip 57 at
the inlet end of the sleeve to an elliptical shelf 53, extending radially
outwardly with respect to the bore surface 56, and radially inwardly with
respect to a rib section or zone. A chamfered surface 58 on the lip 57
cooperates with the chamfered surface of the wall 23 as will be explained
hereinafter.
A multiplicity of channel-defining ribs 60 extend from the shelf 53 toward
but short of the outlet end 50. The ribs are spaced, and are parallel to
the longitudinal center line of the body and sleeve. The ends 61 of the
ribs adjacent the outlet end of the sleeve lie in a common plane
perpendicular to the center line. They are beveled or chamfered as shown
at 62. Radially inner faces 64 of the ribs are all formed on the same
radius as, or, as in this preferred embodiment, slightly larger than the
radius of the bore 56.
A smooth cylindrical, uninterrupted bore section 51 extends between the
ends 61 of the ribs and a chamfer or relief 52 on the inside surface 46 at
the outlet end 50.
In assembling the valve, the O-rings 17, 33 and 28 are mounted in their
respective seats, and the sleeve is slipped over the inlet end of the
body, and forced upward, the chamfer 52 facilitating the compression of
the O-ring 17 and the chamfer 53, the compression of the O-rings 33 and
28, until the lip 57 is cammed by the cam surfaces 23 and 58, over the
wall 23 to snap into the race 34.
When the sleeve is rotated to its closing position, the O-ring 33 of the
elliptical seat engages the smooth and uninterrupted inner surface 56 of
the wall 4, as shown in FIG. 2. In that position, liquid coming through
the inlet end 20 passes through the inlet ports 37, but is prevented from
going any farther by the O-ring 33. When the sleeve is rotated so that the
ribs 60 engage the surface of the O-ring nearest the outlet end of the
body, the ribs permit liquid flowing through the inlet ports 37 to move
through the channels between the ribs, thence through the outlet ports 39,
through the conduit section 11. In an intermediate position, the available
channels are fewer so that the flow is restricted.
As is evident from the fact that the faces 64 of the ribs lie on the same
radius as or slightly greater radius than that of the uninterrupted
surface of the bore 56, the engagement of the ribs with the O-ring 33 does
not require any compression or expansion of the O-ring, so that rotation
of the sleeve is uniformly smooth and wear of the O-ring is minimized.
The manufacture of the valve of this invention will be apparent to those
skilled in the plastic molding art.
Numerous variations in the construction of the valve of this invention
within the scope of the appended claims will occur to those skilled in the
art in the light of the foregoing disclosure. Merely by way of example,
the direction of flow of liquid through the valve can be reversed. Liquid
flowing from the outlet end toward the inlet end will be blocked by the
O-ring 33 in the position shown in FIG. 2, and permitted to flow when the
sleeve is in the position shown in FIG. 3. More or fewer ribs can be
provided, and their depth and spacing can be varied to accommodate
different anticipated flow rates. The pitch of the elliptical seat can be
changed to provide different opening and closing rates. Instead of
circular holes in the body on either side of the elliptical seat, slots of
various configurations can be employed. A cruciform arrangement of slots
at the outlet side and a pair of rectangular slots both on one side of a
diameter on the inlet side of the elliptical seat has been found to be
particularly desirable as permitting a greater flow of liquid through the
valve by virtue of an increased area of opening, the slots extending
axially of the body a substantial distance. Other types of seals can be
used, for example labyrinth seals, particularly for the inlet and outlet
seals. The partition 35 does not have to be made diagonal nor does it have
to be positioned exactly with respect to the elliptical seal seat, as long
as it lies between the inlet ports 37 and the outlet ports 39. Although
the preferred material from which the valve body and sleeve are molded is
polypropylene, other materials can be used. The valve could be made of
metal, although a metal valve is more expensive and heavier. Other means
for rotatably mounting the sleeve on the body, different from the lip and
race arrangement shown, can be provided, such as a retaining ring in a
narrow channel. Slots extending axially through the lip can be provided to
increase the flexibility of the lip to facilitate its mounting. These are
merely illustrative.
Top